Adjustable stroke sirup pump



Feb. 26, 1952 v. P. STEELE 587,241

ADJUSTABLE STROKE SIRUP PUMP 7 Filed Feb. 14, 1948 4 Sheets-Sheet l INVF'NTOR Vernon 1 Steele ATTOR V. P. STEELE ADJUSTABLE STROKE SIRUP PUMP Feb. 26, 1952 4 Sheets-Sheet 2 Filed Feb. 14. 1948 u. I 1 3 I E 4 5 l 0 m 1 0' 7. a a v 3 2 a n v d a I w m J m w t lNVE NTOR Velrzon P SZeeZe Feb. 26, 1952 I v. P. STEELE ADJUSTABLE STROKE SIRUP PUMP 4 Sheets-Sheet 3 Filed Feb. 14, 1948 INVENTOR Veg non 1 Steele AT0R Feb. 26, 1952 v. P. STEELE ADJUSTABLE STROKE S IRUP PUMP 4 Sheets-Sheet 4 Filed Feb. 14, 1948.

INVENTOR Vernon P. Steele ATTOR Patented Feb. 26, 1952 UNITED STATES PATENT OFFICE ADJUSTABLE STROKE SIRUP Vernon P. Steele, Noroton, Conn., assignor to Kenco Products Corporation, New York, N. Y.

Application February 14, 1948, Serial No. 8,331

Claims. (craze-s09) l 1 r This invention relates to a syrup pump. One of the objects of this invention is to provide a syrup pump which is simple, thoroughly practical and durable in use. Another object is to may be. disassembled for purposes of cleaning and then. reassembled by the user with extreme ease. Still another object is to provide a construction of the above character in which pockets,

grooves, cracks and inaccessible corners have I been eliminated so that all parts of the pump may be readily cleaned. Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts as will be exemplified in'the structure to be hereinafter described and the scope of the application of which will be indicated in the following claims.

In "the accompanying drawings, in which is shownlone of the various possible embodiments of this pump,

Figure 1 is a side view of the pump partly in elevation :and partly in section mounted on a syrup receptacle;

Figure 2 Iis a horizontal section taken on the line 2- of Figure 1;

Fi ures is a vertical section of certain parts of the pump taken on the line 3-3 of Figure 2;

Figure 4 "'is.,.a horizontal section taken on the line 44. of Figure 3;

Figure 5 is a horizontal section taken on the section taken on the Figure 11 is a vertical section taken on the line Il-|I of Figure 7.

Similar reference characters refer to similar parts throughout the several views of the drawings. H

As conducive to a clearer understanding of certain features of this invention, it might here be pointed out that mostsyrup pumps now in use are unsatisfactory. The main reason these pumps are unsatisfactory lies in the fact that they are extremely difiicult to properly clean,

and thus are unsanitary. Many of the pumps now in use have blind spots in their delivery tubes or other parts which cannot be reached directly during cleaning and in which syrupaccumulates. These places then form b'r'eeding spots for bacteria, producing a highly unsanitarycondition. Another difficulty with pumps now in use lies in the fact that they are extremely difficult to disassemble and then reassemble. This has to be done to thoroughly clean any pump, and in a majority of cases, the persons operating the pump Will not bother to disassemble them because of the amount of work this entails. Accordingly, one of the major objects of this invention is to provide a pump which is sanitary, in that all of its parts may be readily cleaned, and which may be disassembled and assembled with a -maximum of ease in a minimum of time.

' In general, the pump includes a supporting plate, generally indicated at ill (Figure 1), which supports all of the parts of the pump and which forms the cover for a syrup receptacle II. A knob; generally indicated at i2, is operatively connected to a plunger rod l3 (Figures 1 and. 8) which in turn is connected to a plunger I4. Plunger I4 acts as a piston within a cup, generally indicated at 15, to force syrup during a discharge stroke upwardly through a delivery tube l6, and thence out through a removable spout, generally indicated'at l1. Syrup is discharged when knob l2 (Figure 1) moves downwardly, and after this stroke is completed, spring l8 moves knob l2 and plunger I4 (Figure 8) upwardly. During upward movement of plunger M, the valve, generally indicated at 19, opens and syrup flows into and fills cup [5 through port 20.

Specifically, plunger rod l3 (Figure 4) extends upwardly through a hole 2! in supporting member Ill. The portion "1a of member l0 surrounding member I!) is struck upwardly to form a water guard to prevent Water from flowing across the top of member ID and thence downwardly .water guard Ilia, liquids cannot flow through cated at. 30 (Figural, '7 and 8) into receptacle II (Figure 1) through hole 2| (Figure 3). Supporting member III is preferably reinlorced beneath water guard Ifla in any suitable manner, such as by reinforcing ring 22.

Reinforcing ring 22, in addition to strengthening water guard Ida, forms a bearing for rod I3.

A pair of telescoping sleeves 23 and 24 are mounted on rod I3 above supporting member In. Sleeve 24zha's an'inwardly extending flange 24a on its lower end, the lower surface 25 of which is beveled inwardly to fit water guard Illa to thus form a seal at this point. The upper surface of flange 24a acts as a seat for the lowerend of spring I8. Sleeve 23, within which sleeve 24 telescopes, has a flange member 23a mounted within the sleeve adJacent its upper end. The upper end I3a of rod is is threaded and is provided with flattened sides (Figure 4), Flange member 23a (Figure is provided with a hole 26 of the same shape but slightly larger than end I3a of rod I3 so that sleeve 23canbe mounted on plunger rod I3.

The upper end or spring I8 acts against the under surface of member 23a,and knob I2 holds sleeves 23 and 2d and spring I8 in assembled relationship with respect to each other. Knob I2 is provided with a threaded hole 2I which extends upwardly into its lower end and is threaded with threads complementary to the threads on the upper end of rod Knob I2 is also provided with a shank portion I2a which fits within the upper end of sleeve'23 and has a pin 28 thereon, the lower end of which, when the pump is assembled, fits in a hole 29 in member 230..

In assembly, sleeve 24 is placed on water guard lea, spring I8 is placed on rod I3 and then sleeve 23 is mounted on sleeve 22 and the upper end of rod I3. Sleeve '23 is pressed downwardly and knob I2 is threaded upon the upper end of rod I3. The amount that knob I2 is threaded upon the upper end or rod I3 determines the stroke of the pumpand'thus the volume pumped. Thus, if a long stroke is desired, knob I2 is threaded onto rod I3 until end iSa is positioned well up in the hollow interior l2b of knob I2. a short stroke is desired, knob I2 is threaded onto rod 'end I30t only a short distance. While knob Because of the shape of the upper end of rod I3,

sleeve 23 cannot turn with respectto rod I3, and thus, when pin .28 enters hole 29, knob l2 cannot turn with respect to rod I3. When knob I2 is pressed downwardly, spring I8 is compressed, and thus, when the user releases pressure upon the knob, spring I8 returns knob I2 and thus rod I3 to a raised position. Because of the manner in which sleeves 23 and 24 are telescoped, and because of the vcoaction of sleeve 24 with hole .2I into the syrup being pumped when cover is being cleaned, as is often done when a pump is in use.

The cup I5 (Figures 1 and 8)" is detachably mounted on a supporting ring, generally indi- Supporting ring 30' is'mounted upon cover ID by a supporting rod 3| and delivery tube IS. The upperend of rod 3I is;connected to cover It and supporting ring '30 many suitable manner, such as by welding.

4 Delivery tube I 6,the lower end or which extends a substantial distance below supporting ring (Figure 8), is welded to a flange 3% (Figure 7) extending inwardly from ring 30, and its upper end extends through a hole 32 in cover It, and thence through a hole 33 in a base member 34 on which spout I! (Figure 3) is mounted. Tube I5 is connected to base member 34 in any suitable manner, such as by welding. Tube I6 and rod 3| (Figures 1 and 8) rigidly support'ring 3t and hold it in a plane parallel to cover member II).

"Cup l5 (Figures 7 and 8) is detachably mounted on ring 38 and is provided with a flange 35 on its upper edge having ear portions 35a, 35b, 35c and 35d extending outwardly therefrom. Ring support 30 isprovided with a series of ears 30a, 33b, 33c andSIId which extend inwardly and downwardly from the plane of supporting ring 30. These ears are so shaped that when cup I5 is placed with flange .35 against ring 30 with ears 35a, 351 350 and 35d positioned between ears 39a, 30b, 30c and 30d, and cup I5 is turned counterclockwise as viewed in Figure 7, the ears 35a, 35b, 35c and 35d move into interlockingrelationship with respect to ears 36a, 30b, 30c and 30d.

Limit stops 3! and 38 (Figures 7 and 11) are provided on ear 35c tolimit the amount which cup I5 may be turned when it is being mounted upon. or .removed from the syrup pump. When the cup is being mounted .on the syrup pump, stop 37 engages ear 300 to limit the cups movement in a counterclockwise direction, and when the cup isbeing removed from the pump, .stop 38 engages ear 3011 when the cup is so positioned that the ears on the cup and supporting ring ears are disengaged. Thus, it will be'seen that cup I5 is so mounted ,upon ring 3.0 that it may be quickly and easily attached or removed. Furthermore, by mounting it upon ears of the type described, all unsanitary cracks, pockets, or crevicesare eliminated and all points on both the ring and cup are readily accessible for cleaning.

Referring to Figure 8, it will be noted that the delivery tube lli extendsthrough a hole 40 in plunger I4 and that its lower end IGa is positioned a short distance above the bottom I: of cup I5. Referring to-Figure '7, it will be noted that the ears on cup I5-are 'not equidistantly spaced from each other and that they are so positioned that the cup may be mounted on the syrup pump in only one position. This insures that flap .valve IE will always be positioned directlybeneath the lower ,end ofdelivery tube It (Figure 8). Flap valve I9 includes a disc 4I having aplurality; oj:1;,egs,42 extending downwardly therefrom. Legs 42 are resilientextend'through port 25 inthe bottorrrof cupI5, and are so positioned that valve I9 is free to move upwardly and'downwardly with ,respect :to port 20. The legs 42 are preferably provided with feet 42ato holdvalve I9 on. cup I5 whenitthe cup is-removed from the syrup pump. Because of the "position of valve I9, its construction and the manner in which it is mounted in port '29, when spring I8 moves plungerM from the position indicated by the dotted line 4'! to the position it occupies in Figure 8, syrup flows into cup I5 through port 23, raising valve I9 to cover thelower end of delivery tube l6. This prevents the fluid pumped into the delivery tube during the preceding pumping stroke from being drawn back into cup I5. During apum'ping stroke, valve I 9 moves downwardly to close port 20 and plunger I4 forces the syrup within cup upwardly through delivery tube l6 and thence out through spout l1.

Spout I1 (Figures 1 and 3) is mounted upon base member 34 which is secured to cover It in any suitable manner, such as by welding, and is provided with ears 34a, 34b and 340 (Figure 6) which coact with ears 50a, 50b and 50c extending inwardly from the lower edge of spout base 50 to detachably mount spout I! on the syrup pump.

The upper end [6b of tube [6 extends above member 34 and forms the lateral support for a rubber washer 5|. The ears on base member 34 and spout base 50 are so formed that when base 50 is placed on member 34 with ears 34a, 34b and 340 in the spaces between ears 50a, 50b and 500 and the spout is turned, then base 50 is drawn toward base member 34 to compress washer 5|- and thus form a tight connection between the spout and member 34. It Will be noted that spout I1 is substantially straight and that its lower end l'la fits flush against the upper end of delivery tube l6. Delivery tube I6 is also straight and open at both ends. Thus, by removing spout H from the pump, both the spout and delivery tube may be easily and quickly cleaned.

To look spout I! in position upon cover ll], the base 59 of the spout is provided with a recess 69. When the spout is being mounted upon support 34, sleeve 24 is raised. After base 50 is mounted upon member 34, sleeve 24 is released and it slides down into recess 60. Thus, sleeve 24 prevents base 50 from being turned, so that if it is accidentally struck, it cannot become loose. When it is desired to remove the spout l1, sleeve 24 is again raised, and base 50 is turned until its ears 50a, 50b and 59c register with the open spaces between ears 34b, 34c and 34a, at which time it may be removed fromthe pump.

Thus, a syrup pump has been disclosed which is so constructed that it may be easily disassembled and then reassembled by the user, and is also constructed so that all parts may be readily cleaned. When the user desired to disassemble the pump, sleeve 23 is moved downwardly and knob l2 (Figure 3) is unscrewed from the upper end of rod l3. After cup I5 is removed, rod [3 drops downwardly (Figure 8) so that the user may readily clean all of the parts above cover H], as Well as plunger l4 and rod 13. Next, spout I? can be removed, and because there are no blind spots in either spout I! or delivery tube I6, these also may be readily cleaned. When it is desired to assemble the" pump, spout I! may be replaced, 'thenplunger 14 mounted on tube IS with rod I 3 extending through hole 2| (Figure 3) Next, sleeves 23, 24, spring 18, and knob l2 are assembled as described hereinabove. During this assembly, the lower end of rod I3 is supported because delivery tube I6 (Figure 8) extends through plunger Hi. This is of material aidto the user in assembling the upper portion of a syrup pump, as rod [3 is maintained in substantially a vertical position. After the parts are mounted on rod I3, cup I5 is mounted upon ring 30 (Figure 8) and the pump is ready to operate.

Thus, it will be seen that a thoroughly practical and efficient syrup pump has been disclosed. In this pump, because of the novel construction of the parts mounted on rod 13 above cover I0,

leakage into the pump down the plunger rod is prevented. Furthermore, the cup is removable and is so constructed that all parts of the cup and the member on which it is mounted may be readily cleaned. Furthermore, the delivery tube is straight and both'ends are open when the pump is disassembled so that it may be readily cleaned. It also will be noted that the spout is removable, may be readily cleaned, and together with the delivery tube forms a syrup delivery conduit which is clean and in which pockets, corners, crevices and other places in which syrup or foreign material might collect have been eliminated.

As many possible embodiments may be made of the above invention and as many changes might be made in the embodiment above set forth, it is to be understood that all matter hereinbefore set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

What is claimed is:

1. In a syrup pump, in combination, a cover member, a plunger rod, a plunger, 21. cup, supporting means detachably mounted on said cover member, means detachably mounting said cup on said supporting means, a delivery tube extending through said plunger and said cover member into said cup, said delivery tube being straight and open at both ends, a spout, base members mounted on said spout and cover member, ear means on said spout and cover base members for connecting said spout to said delivery tube, said ear means being engaged by turning said spout with its pivotal axis at right angles to said cover member, a sleeve mounted on said plunger rod, means resiliently holding said sleeve in engagement with said cover member, and means forming a recess in said spout base member, a portion of the lower end of said sleeve fitting into said recess to prevent said spout from being turned unless said sleeve is raised.

2. In a syrup pump, in combination, a cover member, a plunger rod, a cup, supporting means mounted on said cover member, means detachably mounting said cup on said supporting means, a delivery tube extending through said cover member and said plunger into said cup, spout means connected to the upper end of said delivery tube, said delivery tube being straight, open at both ends and having its lower end positioned a short distance above the bottom 01 said cup, and a flap valve mounted in the bottom of said cup, said flap valve including a disc por tion having a plurality of legs thereon, said legs extending through the intake port of said cup,

said valve being free to move upwardly and downwardly with respect to said intake port, said disc portion of said flap valve in its uppermost position covering the lower end of said delivery tube. and when in its lower position coveringsaid port whereby when liquid is being drawn into said cup said valve prevents liquid from being drawn from said tube and when syrup is being pumped out of said cup said valve covers said intake port.

3. In a syrup pump, in combination, a cover member, a plunger rod, a plunger, a cup, means connecting said cup to said cover member, a delivery tube, a spout, said delivery tube being connected to said spout and extending into said cup, base members mounted on said spout and cover member, ear means on said spout and cover base members for connecting said spout to said delivery tube, said ear means being engaged by turning said spout with its pivotal axis at right angles to said cover member, a sleeve member mounted on said plunger rod, means resiliently holding said sleeve member in engagement saidcover member, and means formmg arecess inlsai'disp'out base member, a portion of the lower end of said sleeve fitting into saidrecess to prevent said spout from being turned unless said sleeve is raised.

4; In a pump, in combination, a cover member, a-plunger rod, a plunger mounted on the lower end of said plungerro'd, a cup having a cylindrically shaped sidewall, supporting means mounted ons'aid cover member, means detachably mounting said cup on said supporting means, the inner diameter of said cupbein slightly greater than the diameter of said. plunger, said plunger being positioned in said cup, said delivery tube extending through and being connected 'to said cover member and extending through a hole in said plunger into said cup, said delivery tube having its lower end positioned a short distance above the bottom of said cup, means forming a intake port in the bottom of said cup beneath the lower end of said delivery tube, the lower end of said delivery tube lying in a plane substantially parallel to the bottom of said cup, a flat valve disc slightly greater in diameter than the diameter of said delivery tube, and means mounting said disc over said port for a vertical movement with respect thereto so that its flat upper surface can engage the lower end of said delivery tube, said disc being capable of closing said port when in its lower-most position, whereby, when said plunger is moved upwardly to draw liquid into said cup, the liquid flowing in through said port causes said disc to move upwardly and cover the lower end of said delivery tube to prevent liquid in the delivery tube from being drawn back into said cup.

5. In a pump, in combination, a cover, a supporting member, a delivery tube, a supporting rod, said delivery tube and said rod being connected to said cover and to said supporting member and holding said supporting member parallel to said cover, a plunger rod, means for actuating said plunger rod, a plunger mounted on the lower end of said plunger rod, said delivery tube passing through a hole in said plunger, a cup member, said plunger being positioned within said cup member, means forming slots on one of said members, means forming ear means on the other of said members, said slots and ear means being movable into and out of interlocking engagement with respect to each other by rotating said-members with respect to each other, means forming an intake port in the bottom of said cup beneath the lower end of said delivery tube, said intake port being slightly greater in diameter than the diameter of said delivery tube, the edge of the lower end of said delivery tube being positioned adjacent the bottom of said cup and lying in a plane substantially parallel to the bottom of said cup, a valve disc mounted over said intake port, the diameter of said disc being slightly greater than the diameter of said intake port, means mounting said valve for vertical movement with respect to the bottom of said cup so that it can be moved upwardly into engagement with the edge at the lower end of the delivery tube, said flat valve being capable of closing the lower end of said delivery tube when liquid is being drawn into said cup, and closing said intake port when liquid is being pumped out of said cup by said plunger.

6. In a pump, in combination, a cover, pump mechanism mounted on said cover, a delivery tube for said pump mechanism mounted on said cover, means forming a hole in said cover, a rod for actuating said pump mechanism, saidrod ex tending upwardly through saidholepmeans limiting upward movement of said rod, means onsaid cover around said hole extending upwardly a short distance from said cover to form a watel guard, a sleeve detachably mounted on said rod above said cover, said water guard extending up= wardly into the lower end of said sleeve, a knob detachably mounted onthe upper end of said rod, a second sleeve, the lower portion of said knob closing the upper end of said second sleeve, said first-mentioned sleeve telescoping into said sec ond-mentioned sleeve, and spring means acting between said sleeves to resiliently urge them away from each other and thus hold said lower sleeve in covering position with respect, to said water guard and said upper sleeve in engagement with said knob.

7. In a pump, in combination, a cover, pump mechanism mounted on said cover, a delivery tube for said pump mechanism mounted on said cover, means forming a hole in said cover, a rod for actuating said pump mechanism, said rod extending upwardly through said hole, means limiting upward movement of said rod, means on said cover'around said hole extending upwardly a short distance from said cover to form a water guard, a sleeve detachably mounted on said rod above said cover, said water guard extending upwardly into the lower end of said sleeve, a knob detachably mounted on the upper end of said rod, a second sleeve, the lower portion of said knob closing the upper end of said second sleeve, said first-mentioned sleeve telescoping into said second-mentioned sleeve, a seat formed on said second-mentioned sleeve adjacent its upper end, a seat formed on said first-mentioned sleeve adjacent its lower end, and spring means acting between said seats to hold said lower sleeve in covering position with respect to said water guard and said upper sleeve in engagement with said knob, said sleeves and spring means being removable from said rod when said knob is detached.

8. In a syrup pump, in combination, a cover, pump mechanism mounted on said cover, a delivery tube connected to said pump mechanism, means forming a hole in said cover, a rod for actuating said pump mechanism, means limiting upward movement of said rod, said rod extending upwardly through said hole, means on said cover around said hole extending upwardly a short distance to form a Water guard, a first sleeve detachably mounted on said rod above said cover, said water guard extending upwardly into thelower end of said sleeve, means limiting upward movement of said pump rod, a knob threaded onto the upper end of said rod, a second sleeve extending downwardly fromsaid knob, the lower end of said second sleeve limiting downward movement of said rod when it engages the top of said cover, said knob closing the upper end of said last mentioned sleeve, said knob being adjustable longitudinally of said rod to move said last mentioned sleeve longitudinally of the rod and thus lengthen or shorten the stroke of said pump rod, spring means engaging and acting between said sleeves to resiliently urge said second sleeve and knob upwardly and said first sleeve downwardly, said first sleeve telescoping into said second sleeve and said spring means holding said first sleeve in covering position with respect to said water guard means.

9. In a syruppump, in combination, a cover,

pump mechanism mounted on said cover, a delivery tube connected to said pump mechanism, means forming a hole in said cover, a rod for actuating said pump mechanism, means limiting upward movement of said rod, said rod extending upwardly through said hole, means on said cover around said hole extending upwardly a short distance to form a water guard, a sleeve detachably mounted on said rod above said cover, said water guard extending upwardly into the lower end of said sleeve, means limiting upward movement of said pump rod, a knob threaded onto the upper end of said rod, a sleeve extending downwardly from said knob, the lower end of said sleeve limiting downward movement of said rod when it engages the top of said cover, said knob closing the upper end of said last mentioned sleeve, said knob being adjustable longitudinally of said rod to move said last mentioned sleeve longitudinally of the rod and thus lengthen or shorten the stroke of said pump rod, and said second mentioned sleeve being movable downwardly with respect to said knob, means preventing rotation of said second mentioned sleeve with respect to said rod, and a locking connection between said second sleeve and said knob to prevent rotation of said knob with respect to said second mentioned sleeve, said locking connection being broken when said second mentioned sleeve is moved downwardly with respect to said 39 knob at which time said knob may be adjusted longitudinally of said rod, said sleeves and spring means being removable from said rod when said knob is disconnected from said rod.

10. In a syrup pump, in combination, a cover member, a plunger rod, a plunger, a cup, supporting. means detachably mounted on said cover member, means detachably mounting said cup on said supporting means, an integral delivery tube extending through said plunger and said cover member into said cup, said delivery tube being straight and open at both ends, a base member mounted on said cover on the upper end of said delivery tube, said tube extending through said base member, ear means formed on said base member, a tube forming a spout, a base member formed on said spout, said spout extending through said spout base member, and ear means 1 formed on said last-mentioned base member,

said ear means being so shaped and positioned that when said spout base member is mounted on said cover base member and turned, said ears interlock to connect said spout to said delivery tube, the lower end of said spout tube abutting against the upper end of said delivery tube.

VERNON P. STEELE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,045,964 Friese Dec. 3, 1912 1,918,903 Fletcher July 18, 1933 2,398,051 Shaw Apr. 9, 1946 2,443,555 Dunkin J ne 15, 1948 

